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rashid-mamun/README.md

Hi, I'm Mamunur Rashid 👋

Backend Engineer · Microservices · Distributed Systems

Backend Engineer with 3+ years building production-grade systems at scale. Currently at ShareTrip — Bangladesh's largest OTA — architecting microservices that power real-time flight search, booking, and pricing for thousands of daily users.

🛠 Tech Stack
Languages TypeScript · JavaScript · Go (learning)
Frameworks NestJS · Express.js · Socket.IO
Databases PostgreSQL · MongoDB · MySQL · Redis
Messaging RabbitMQ · Apache Kafka · BullMQ
DevOps Docker · AWS S3 · GitHub Actions · CI/CD
Testing Jest · Supertest · socket.io-client

💼 Experience Highlights

ShareTrip — Software Engineer (Nov 2022 – Present)

  • Architected microservices for flight search & booking across 20+ airlines
  • Built multi-airline booking engine — 20% revenue growth, 15% fare reduction
  • Redis + RabbitMQ pipelines cutting server failure rates by ~40%

ChillyPOS — Backend Developer (Apr 2025 – Mar 2026)

  • Built multi-tenant POS backend from scratch — 100+ paying restaurant clients
  • 40+ REST APIs, BullMQ processing 500+ jobs/day, WebSocket real-time tracking

HalalExplore — Backend Developer (Jul 2023 – Feb 2024)

  • Halal-compliant travel platform — Ratehawk & Hotelbeds API integration
  • ~90% reduction in manual booking errors via automated workflows

🚀 Featured Projects

Project Description Stack
recruitAI AI-powered recruiting automation with real-time SSE streaming and multi-tier AI fallback TypeScript · NestJS
chat-app-backend Real-time chat — private/group messaging, file sharing, 2FA, 163 tests, 83%+ coverage Node.js · Socket.IO · Redis
lets-form-a-team-nest-js Role-based access control system with JWT refresh token rotation and Redis sessions NestJS · TypeORM · MySQL
halal-explorer-backend Halal-compliant travel platform — hotels, cruises, transfers & packages Express.js · MongoDB
bdshop-server Scalable e-commerce REST API with cart, orders, and inventory management Node.js · MongoDB
St-logger Flight API logger with structured logging Express.js · Mongoose

📊 GitHub Stats

🏆 Competitive Programming

LeetCode  HackerRank

🌱 Currently Deepening

Distributed systems design · Cloud-native architecture on AWS · Go for backend services

⭐️ Open to collaborating on backend systems, distributed architectures, and scalable applications

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  1. recruitAI recruitAI Public

    An AI-powered recruiting automation app featuring real-time SSE streaming, multi-tier AI fallback, and fault-tolerant candidate sourcing.

    TypeScript

  2. ride-hailing-microservices ride-hailing-microservices Public

    Ride-hailing microservices backend with NestJS, PostgreSQL, RabbitMQ, Redis, Docker, and Swagger documentation.

    TypeScript

  3. chat-app-backend chat-app-backend Public

    Real-time chat application backend with private messaging, group chats, and file sharing.

    JavaScript

  4. bdshop-server bdshop-server Public

    A scalable RESTful API for an e-commerce platform, built with Node.js and MongoDB.

    TypeScript

  5. halal-explorer-backend halal-explorer-backend Public

    Halal-compliant travel platform — hotels, cruises, transfers & packages.

    JavaScript

  6. tech-interview-hub tech-interview-hub Public

    Tech Interview Hub - Backend, System Design, Database, Networking, Docker, Node.js and NestJS interview notes

    JavaScript